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2 years ago

Hey can you help me with this

Mathematics

1 answer:

slavikrds [6]2 years ago

4 0

X = 1/2, x=5 !!!!!!!!!!!!

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The mean incubation time of fertilized eggs is 19 days. Suppose the incubation times are approximately normally distributed with

pochemuha

Answer:

a)17.92

b) 16.83 .... 21.17

Step-by-step explanation:

ρ→ z

0.14 = -1.080319341

-1.080 = (x - 19)/1 = 17.92

~~~~~~~~~~~~~~~~~~

3% / 2 = 1.5%

1.5% - 98.5%

ρ→ z

0.015 = -2.170090378 .... -2.17 = (x-19) =16.83

0.985 = 2.170090378 .... 2.17 = (x-19) =21.17

8 0

3 years ago

Un cono ha l'area laterale di 255 pigreco cm^2, l'apotema di 17 cm e pesa 900 pigreco g. Calcola il peso specifico del materiale

valkas [14]

Answer:

The specific weight is $1.5\frac{g}{cm^{3}}$

Step-by-step explanation:

The question in English

A cone has a lateral area of 255 pi cm^2, an apothem of 17 cm and weighs 900 pi g. It calculates the specific weight of the material of which it is composed

step 1

Find the radius of the cone

we know that

The lateral area of a cone is equal to

$LA=\pi rl$

we have

$LA=255\pi\ cm^{2}$

$l=17\ cm$

substitute the values

$255\pi=\pi r(17)$

Simplify

$255=r(17)$

$r=255/(17)=15\ cm$

step 2

Find the height of the cone

Applying the Pythagoras Theorem

$l^{2} =r^{2} +h^{2}$

substitute the values and solve for h

$17^{2} =15^{2} +h^{2}$

$h^{2}=17^{2}-15^{2}$

$h^{2}=64$

$h=8\ cm$

step 3

Find the volume of the cone

The volume of the cone is equal to

$V=\frac{1}{3}\pi r^{2}h$

substitute the values

$V=\frac{1}{3}\pi (15)^{2}(8)$

$V=600\pi\ cm^{3}$

step 4

Find the specific weight

Divide the mass by the volume

$\frac{900\pi }{600\pi}=1.5\frac{g}{cm^{3}}$

4 0

3 years ago

2. A boy runs at a speed of 10m/s. How long does he take to cover a distance of 1.5 km?<br> 'D Focus

jek_recluse [69]

1500m=1.5km so 1500 divided by 10= 150s it takes 150s to cover a distance of 1.5km

5 0

3 years ago

Which values of

I am Lyosha [343]

83x + P = 83x + Q <em>subtract 83x from both sides</em>

P = Q

The equation has no solution for P different Q (P ≠ Q).

7 0

3 years ago

Write a fourth grade word problem where the answer is 35.

rusak2 [61]

Answer:

Step-by-step explanation:

15+14+6

15+14= 29

29+6= 35

7 0

3 years ago

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